Manassas is an independent city in the Commonwealth of Virginia. As of the 2010 Census, the population was 37,821. The city borders Prince William County, and the independent city of Manassas Park, Virginia. The Bureau of Economic Analysis includes both Manassas and Manassas Park with Prince William County for statistical purposes. Manassas also serves as the seat of Prince William County. It surrounds the 38-acre (150,000 m2) county courthouse, but that county property is not part of the city. The City of Manassas has several important historic sites from the period 1850–1870. The City of Manassas is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area and it is situated in the Northern Virginia region. The Manassas Historic District, Cannon Branch Fort, Liberia, a plantation house; and the Manassas Industrial School for Colored Youth are listed on the National Register of Historic Places.
The ACS estimated median household income for the City in 2010 was $70,211. 36% of the population has a college degree. Almost as many people commute into the City of Manassas for work (13,316) as out (13,666), with the majority of out commuters traveling to Fairfax and Prince William counties for their jobs. Unemployment as of July, 2010 in the City is 6.3%, which was well below that of the United States at 7.9%. City residents are primarily employed in Professional, Scientific and Technical Services, and Health Care and Social Assistance. The major roads into and out of Manassas are Virginia State Route 28, Virginia State Route 234 and Virginia State Route 234 Business. Manassas Regional Airport is located within the city limits. The Manassas Regional Airport is the busiest general aviation airport in the Commonwealth of Virginia with more than 415 based aircraft and 26 businesses based onsite ranging from charter companies, avionics, maintenance, flight schools and aircraft services.